257609690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{659}}^1$

素因数の和:807

約数の個数: 64

約数和(自身を含む): 521579520

約数和(自身を除く): 263969830

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 97, 130, 155, 194, 310, 403, 485, 659, 806, 970, 1261, 1318, 2015, 2522, 3007, 3295, 4030, 6014, 6305, 6590, 8567, 12610, 15035, 17134, 20429, 30070, 39091, 40858, 42835, 63923, 78182, 85670, 102145, 127846, 195455, 204290, 265577, 319615, 390910, 531154, 639230, 830999, 1327885, 1661998, 1981613, 2655770, 3963226, 4154995, 8309990, 9908065, 19816130, 25760969, 51521938, 128804845, 257609690]

約数ペア:

[(1, 257609690), (2, 128804845), (5, 51521938), (10, 25760969), (13, 19816130), (26, 9908065), (31, 8309990), (62, 4154995), (65, 3963226), (97, 2655770), (130, 1981613), (155, 1661998), (194, 1327885), (310, 830999), (403, 639230), (485, 531154), (659, 390910), (806, 319615), (970, 265577), (1261, 204290), (1318, 195455), (2015, 127846), (2522, 102145), (3007, 85670), (3295, 78182), (4030, 63923), (6014, 42835), (6305, 40858), (6590, 39091), (8567, 30070), (12610, 20429), (15035, 17134)]